Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/5/84; site wang.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!gamma!epsilon!zeta!sabre!petrus!bellcore!decvax!wanginst!wang!ephraim
From: ephraim@wang.UUCP (pri=8 Ephraim Vishniac x76659 ms1459)
Newsgroups: net.micro.mac
Subject: MacTerminal File Transfer Speed
Message-ID: <765@wang.UUCP>
Date: Tue, 25-Feb-86 09:05:43 EST
Article-I.D.: wang.765
Posted: Tue Feb 25 09:05:43 1986
Date-Received: Fri, 28-Feb-86 07:39:11 EST
Distribution: net
Organization: Wang Labs, Lowell MA
Lines: 21

With all this discussion in info-mac and net.micro.mac about
the "real" speed of various terminal emulators, I decided to
run a simple test.  I transferred a large file from a Wang
PC to a Mac and timed the transfer.

The line speed was 19,200 bps.  The machines were set for 
8 data bits, no parity, 1 stop bit.  The file was 174,080
bytes in MacBinary format.  The sending program was "ic",
a VT-100 emulator package, running off a 20meg winchester.
The receiving program was MacTerminal 2.0, running on a HyperDrive.
The transfer was timed with the Mac alarm clock, which stops
updating while a transfer is in progress.

Elapsed time for the transfer was 7:18 (438 seconds).
174080 bytes * 10 bits/byte / 438 seconds = 3974 bps.
(10 bits per byte = 8 data bits + 1 start bit + 1 stop bit).

Allowing 10% xmodem protocol overhead (a generous allowance)
raises the line usage to about 4370 bps or 23%.

I'm not impressed.  Anyone care to try it with two Macs?